JPH02298012A - Manufacture of electrode foil for aluminum electrolytic capacitor use - Google Patents
Manufacture of electrode foil for aluminum electrolytic capacitor useInfo
- Publication number
- JPH02298012A JPH02298012A JP1119005A JP11900589A JPH02298012A JP H02298012 A JPH02298012 A JP H02298012A JP 1119005 A JP1119005 A JP 1119005A JP 11900589 A JP11900589 A JP 11900589A JP H02298012 A JPH02298012 A JP H02298012A
- Authority
- JP
- Japan
- Prior art keywords
- acid
- aqueous solution
- foil
- aluminum foil
- salt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011888 foil Substances 0.000 title claims abstract description 42
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 26
- 239000003990 capacitor Substances 0.000 title claims description 8
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 18
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000007864 aqueous solution Substances 0.000 claims abstract description 16
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 9
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000004327 boric acid Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 7
- 150000003839 salts Chemical class 0.000 claims abstract description 7
- 239000001361 adipic acid Substances 0.000 claims abstract description 5
- 235000011037 adipic acid Nutrition 0.000 claims abstract description 5
- 150000003863 ammonium salts Chemical class 0.000 claims abstract 2
- 159000000000 sodium salts Chemical class 0.000 claims abstract 2
- 239000000126 substance Substances 0.000 abstract description 15
- 229910001593 boehmite Inorganic materials 0.000 abstract description 9
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 239000003513 alkali Substances 0.000 abstract description 3
- 239000002253 acid Substances 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- -1 chlorine ions Chemical class 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000007739 conversion coating Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、電子機器等に用いられるアルミ電解コンデン
サ用電極箔の製造方法に関するもので、特にアルミ電解
コンデンサ用電極箔の化成法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing electrode foils for aluminum electrolytic capacitors used in electronic devices, and more particularly to a method for chemically forming electrode foils for aluminum electrolytic capacitors.
従来の技術
従来のこの種のアルミ電解コンデンサ用電楔箔は、塩酸
等の塩素イオンを含む水溶液中でエツチングを行なって
表面を粗面化させ、そして誘電性酸化皮膜を形成する化
成工程は、純水中でホイルを行なって表面に水和酸化物
（凝ベーマイト）を ′形成し念後、ホウ酸、リ
ン酸、アジピン酸、クエン酸あるいはこれらの塩を含む
化成可能な水溶液中において陽極酸化を行なっていに０
前述した純水ホイル処理によって表面に水和酸化物を形
成することにより、化成時の電気エネルギーを削減でき
るとともに、単位面積あたジの静電容量も２Ｑ％程度増
大させることができるものである。Prior Art Conventional electric wedge foils for aluminum electrolytic capacitors of this type are etched in an aqueous solution containing chlorine ions, such as hydrochloric acid, to roughen the surface, and then undergo a chemical conversion process to form a dielectric oxide film. A hydrated oxide (precipitated boehmite) is formed on the surface by foiling in pure water, and then anodizing in a chemically possible aqueous solution containing boric acid, phosphoric acid, adipic acid, citric acid, or their salts. 0 while doing
By forming a hydrated oxide on the surface through the above-mentioned pure water foil treatment, it is possible to reduce the electrical energy during formation, and also increase the capacitance per unit area by approximately 2Q%. .
発明が解決しようとする課題
前述し乏純水ホイルは、処理時間が長い程、表面に形成
される凝ベーマイト皮膜１も多くなり、そｔに伴って静
電容量も増加する。Problems to be Solved by the Invention Regarding the depleted water foil described above, the longer the treatment time, the more the precipitated boehmite film 1 is formed on the surface, and the capacitance increases accordingly.
ところが、純水ホイルの処理時間が長くなるということ
は、化成時間の増加につながるため、化成の生産性を低
下させてしまう。また純水ホイルの処理時間が長くなる
とアルミ箔の機械的強度が弱くなるという欠点がある。However, the longer processing time for the pure water foil leads to an increase in the formation time, which lowers the productivity of the formation. Another drawback is that the longer the processing time for the pure water foil, the weaker the mechanical strength of the aluminum foil becomes.
実用的には、１０分〜２０分の純水ホイルの処理時間が
一般的に用いられている。In practice, a pure water foil treatment time of 10 to 20 minutes is generally used.
本発明はこのような従来の課題を解消するもので、短時
間で族ベーマイト皮膜を形成することができるアルミ電
解コンデンサ用電極箔の製造方法を提供することを目的
とするものである。The present invention solves these conventional problems, and aims to provide a method for manufacturing an electrode foil for an aluminum electrolytic capacitor, which can form a group boehmite film in a short time.
課題を解決するための手段
上記課題を解決するｔめに本発明は、粗面化されたアル
ミ箔を弱アルカリ水溶液中でホイルし、その後、ホウ酸
、リン酸、アジピン酸、クエン酸あるいはこれらの塩を
含む水溶液中で化成を行なうようにし友ものである。Means for Solving the Problems In order to solve the above problems, the present invention involves foiling roughened aluminum foil in a weak alkaline aqueous solution, and then heating it with boric acid, phosphoric acid, adipic acid, citric acid, or any of these. The chemical conversion is carried out in an aqueous solution containing a salt.
作用
熱水中でホイルした場合の凝ベーマイトの成長速度はｐ
Ｈによって異なるもので、中性の純水中よＶも、弱アル
カリ水溶液中でホイルしｔ方が、族ベーマイト皮膜の成
長速度は速く、また弱アルカリ水溶液として用いられる
ホウ酸あるいはリン酸のアンモニウム塩あるいはすトリ
ウム塩は化成に用いられる薬品であるため、化成皮膜に
侵入あるいは付着しても特性上は全く無害であり、した
がって、本発明のように粗面化されたアルミ箔を弱アル
カリ水溶液中でホイルすれば、化成皮膜には全く無害で
、族ベーマイト皮膜の成長速度を速めることができるた
め、化成の生産性を向上させることができるとともに、
アルミ箔の機械的強度も向上させることができる。The growth rate of precipitated boehmite when foiled in hot water is p
The growth rate of the group boehmite film is faster when the film is foiled in a weak alkaline aqueous solution than in neutral pure water. Since salt or storium salt is a chemical used in chemical conversion, it is completely harmless even if it invades or adheres to the chemical conversion film. If foil is used inside, it is completely harmless to the chemical conversion film and can speed up the growth rate of the group boehmite film, improving the productivity of chemical conversion.
The mechanical strength of aluminum foil can also be improved.
実施例 以下、本発明の実施例を第１図にもとづいて説明する。Example Embodiments of the present invention will be described below with reference to FIG.
第１図はホイル時間と、ホイルにより形成される皮膜重
量の関係を示したもので、この場合のホイル温度は９６
℃で行なった。Figure 1 shows the relationship between the foil time and the film weight formed by the foil, and the foil temperature in this case is 96°C.
It was carried out at ℃.
第１図において、（１）は従来例を示したもので、粗面
化されたアルミ箔を純水中でホイルし友ものである。（
２）は本発明の一実施例を示したもので、粗面化された
アルミ箔を０．１％のホウ酸塩であるホウ砂を含むｐＨ
８，８の弱アルカリ水溶液中でホイルしたものである。In FIG. 1, (1) shows a conventional example, in which roughened aluminum foil is foiled in pure water. (
2) shows one embodiment of the present invention, in which roughened aluminum foil is heated to a pH of 0.1% containing borax, which is a borate.
8.8, foiled in a weak alkaline aqueous solution.
（３）は本発明の他の実施例を示したもので、粗面化さ
れたア・ルミ箔を０．１％のリン酸塩であるリン酸／水
素アンモンを含むｐＨ９，２の弱アルカリ水溶液中でホ
イルしたものである。(3) shows another embodiment of the present invention, in which the roughened aluminum foil was heated with a weak alkali of pH 9.2 containing 0.1% phosphoric acid/hydrogen ammonium. It is foiled in an aqueous solution.
この第１図のグラフからも明らかなように、（１）の従
来例においては約１０分のホイルで得られるアルミ箔表
面の皮膜重量が、 ＜２） 、 （３）の本発明の実施
例においては、約２公租度で得られるため、化成のホイ
ル時間を約見に短縮することができる。As is clear from the graph in FIG. 1, in the conventional example (1), the weight of the film on the aluminum foil surface obtained by foiling for about 10 minutes is <2), and in the example of the present invention (3) In this case, since the foil can be obtained with about 2 degrees of consistency, the time for forming the foil can be shortened to about 20%.
ま念（２１、（３）の本発明の実施例で２分ホイルして
化成を行なったものと、（１）の従来例で１０分ホイル
して化成全行なったもののアルミ箔の機械的強度を測定
した結果、本発明の実施例の方が、その耐折強度は２倍
に向上し友。この場合、得られたアルミ箔の静電容量は
（１）の従来例と同じであつ念。Mechanical strength of aluminum foil (21, (3) in which the foil was foiled for 2 minutes and chemical conversion was performed) and the conventional example (1) in which the foil was foiled for 10 minutes and all chemical conversion was performed. As a result of measurement, the bending strength of the example of the present invention was twice as high.In this case, the capacitance of the obtained aluminum foil was the same as that of the conventional example (1). .
またこれらの化成箔をアルミ電解コンデンサに組み込ん
でその特性を測定した結果、（１）の従来例と、（２）
、 ＜３１の本発明の実施例とでは、差はなかった。In addition, as a result of incorporating these chemically formed foils into aluminum electrolytic capacitors and measuring their characteristics, we found that (1) the conventional example and (2)
, <31, there was no difference from the examples of the present invention.
なお、アルミ箔の化成は、粗面化され穴アルミ箔をホイ
ルし、ホウ酸、リン酸、アジピン酸、クエン酸あるいは
これらの塩を含む水溶液中で行なうものである。Note that the chemical conversion of aluminum foil is carried out by forming a roughened aluminum foil into a foil and performing it in an aqueous solution containing boric acid, phosphoric acid, adipic acid, citric acid, or a salt thereof.
発明の効果
以上のように本発明によれば、粗面化されたアルミ箔の
化成処理を行なう場合、粗面化され念アルミ箔を弱アル
カリ水溶液中でホイルするようにしているため、化成皮
膜には全く無害で、族ベーマイト皮膜の成長速度を速め
ることができ、その結果、化成の生産性を向上させるこ
とができるとともに、アルミ箔の機械的強度も向上させ
ることができるものである。Effects of the Invention As described above, according to the present invention, when performing chemical conversion treatment on roughened aluminum foil, the roughened aluminum foil is foiled in a weak alkaline aqueous solution, so that no chemical conversion coating is formed. It is completely harmless to the group boehmite film and can accelerate the growth rate of the group boehmite film. As a result, the productivity of chemical conversion can be improved as well as the mechanical strength of aluminum foil.
第１図はホイル時間とホイルにより形成される皮膜重量
の関係を示すグラフである。FIG. 1 is a graph showing the relationship between foil time and film weight formed by the foil.
Claims (2)
イルし、その後、ホウ酸，リン酸，アジピン酸，クエン
酸あるいはこれらの塩を含む水溶液中で化成を行なうこ
とを特徴とするアルミ電解コンデンサ用電極箔の製造方
法。(1) Aluminum characterized by foiling roughened aluminum foil in a weak alkaline aqueous solution and then chemically converting it in an aqueous solution containing boric acid, phosphoric acid, adipic acid, citric acid, or a salt thereof. A method for manufacturing electrode foil for electrolytic capacitors.
のアンモニウム塩あるいはナトリウム塩を用いることを
特徴とする請求項１記載のアルミ電解コンデンサ用電極
箔の製造方法。(2) The method for manufacturing an electrode foil for an aluminum electrolytic capacitor according to claim 1, characterized in that an ammonium salt or a sodium salt of boric acid or phosphoric acid is used as the weak alkaline aqueous solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1119005A JP2814551B2 (en) | 1989-05-12 | 1989-05-12 | Manufacturing method of electrode foil for aluminum electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1119005A JP2814551B2 (en) | 1989-05-12 | 1989-05-12 | Manufacturing method of electrode foil for aluminum electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02298012A true JPH02298012A (en) | 1990-12-10 |
| JP2814551B2 JP2814551B2 (en) | 1998-10-22 |
Family
ID=14750639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1119005A Expired - Lifetime JP2814551B2 (en) | 1989-05-12 | 1989-05-12 | Manufacturing method of electrode foil for aluminum electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2814551B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007214371A (en) * | 2006-02-09 | 2007-08-23 | Sanyo Electric Co Ltd | Anode, its manufacturing method, and solid electrolytic capacitor |
| CN111863454A (en) * | 2020-06-29 | 2020-10-30 | 凯普松电子科技(包头)有限公司 | Multi-stage manufacturing method for ultrahigh-pressure high-capacity formed aluminum foil |
| WO2023054585A1 (en) * | 2021-09-30 | 2023-04-06 | 日本ケミコン株式会社 | Solid electrolyte capacitor and method for manufacturing same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0243717A (en) * | 1988-08-03 | 1990-02-14 | Shinei Tsushin Kogyo Kk | Manufacture of electrode foil for aluminum electrolytic capacitor |
-
1989
- 1989-05-12 JP JP1119005A patent/JP2814551B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0243717A (en) * | 1988-08-03 | 1990-02-14 | Shinei Tsushin Kogyo Kk | Manufacture of electrode foil for aluminum electrolytic capacitor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007214371A (en) * | 2006-02-09 | 2007-08-23 | Sanyo Electric Co Ltd | Anode, its manufacturing method, and solid electrolytic capacitor |
| JP4650833B2 (en) * | 2006-02-09 | 2011-03-16 | 三洋電機株式会社 | Anode body, manufacturing method thereof, and solid electrolytic capacitor |
| US7990682B2 (en) | 2006-02-09 | 2011-08-02 | Sanyo Electric Co., Ltd. | Anode element, method of manufacturing the same, and solid electrolytic capacitor |
| TWI451460B (en) * | 2006-02-09 | 2014-09-01 | Sanyo Electric Co | Anode element, method of manufacturing the same, and solid electrolytic capacitor |
| CN111863454A (en) * | 2020-06-29 | 2020-10-30 | 凯普松电子科技(包头)有限公司 | Multi-stage manufacturing method for ultrahigh-pressure high-capacity formed aluminum foil |
| WO2023054585A1 (en) * | 2021-09-30 | 2023-04-06 | 日本ケミコン株式会社 | Solid electrolyte capacitor and method for manufacturing same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2814551B2 (en) | 1998-10-22 |
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